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flame vs rotary cut pipe bevel

Why would one be preferred over the other? Rotary doesnt have a HAZ or require any (much?) cleanup but the equipment is very expense relative to flame bevelling. Im sure Im missing more important points.

Same question was asked when I was in school. Teach said that each has their place. On the back of a rig in a field, a torch beveler might be all you can run because you cannot get enough power off that bobcat to run a rotary.

A rotary might be useful some where you cannot have a shower of sparks flying around, like a gas refinery. And why would HAZ be a worry, if your going to weld the pipe anyway, it would not matter.

Same question was asked when I was in school. Teach said that each has their place. On the back of a rig in a field, a torch beveler might be all you can run because you cannot get enough power off that bobcat to run a rotary.

A rotary might be useful some where you cannot have a shower of sparks flying around, like a gas refinery. And why would HAZ be a worry, if your going to weld the pipe anyway, it would not matter.

That a bunch of $ to tie up for the occasional use. Also seems a Bobcat should run one pretty easily.

For high yield strength pipe and the like it seems there would be some cause for concern. Welding parameters are strict (as I understand it) and flaming cutting may not be acceptable in that it overheats the pipe + there would need to be some post heat procedure. So, in that case perhaps some other cutting method is necessary.

ETA: It also occured to me that not all materials can be cut w/ flame. So, in that case perhaps the rotary machine might be used.